Features and Benefits
- High Efficiency: Up to 95%
- Inrush Current Limiting and Output Disconnect
- Programmable Output Voltages up to 6V
- 1.5V to 6V Input Range
- Programmable/Synchronizable Fixed Frequency Operation up to 1.5MHz
- Programmable Automatic Burst Mode® Operation
- Current Mode Control with Programmable Soft-Start Period and Peak Current Limit
- 0.2Ω N-Channel and 0.3Ω P-Channel Switches
- Ultralow Quiescent Currents: 12µA Sleep, <1µA in Shutdown
- 12-Pin 4mm × 3mm Thermally Enhanced DFN Package
The LTC3458L is a high efficiency, current mode, fixed frequency, step up DC/DC converter with true output disconnect and inrush current limiting. The LTC3458L is rated for up to 6V output and includes a 0.2Ω N-channel MOSFET switch and a 0.3Ω P-channel MOSFET synchronous rectifier. The LTC3458L is well suited for battery powered applications and includes programmable output voltage, switching frequency and loop compensation. The oscillator frequency can be set up to 1.5MHz or synchronized to an external clock.
Quiescent current is only 12µA during Burst Mode operation maximizing battery life in portable applications. The Burst Mode current threshold, peak current limit, and softstart are externally programmable. Other features include <1µA shutdown current, antiringing control, and thermal limit. The LTC3458L is available in a low profile (0.75mm), 4mm × 3mm 12-pin DFN package.
Protected by U.S. Patents including 5481178, 6304066, 6580258, 5511131, 6498466
|Vout Range||Switch Current|
|LTC3458||2.0V to 7.5V||1.4A|
|LTC3458L||2.0V to 6.0V||1.7A|
- Point-of-Load Regulators
- USB VBUS Power
- Portable GPS
- MP3 Players
Product Lifecycle Production
At least one model within this product family is in production and available for purchase. The product is appropriate for new designs but newer alternatives may exist.
Evaluation Kits (1)
Demonstration circuit 878 is a 1MHz Synchronous Step-Up DC/DC Converter featuring the LTC3458LEDE. The demo board demonstrates a DC/DC boost converter, with a 1.7A switch, providing 5V at 300mA to 900mA depending on input voltage, which ranges from 2V to 5V.
The circuit demonstrates the advantages of output disconnect and inrush current limiting.
Tools & Simulations
LTspice® is a powerful, fast and free simulation software, schematic capture and waveform viewer with enhancements and models for improving the simulation of analog circuits.
To launch ready-to-run LTspice demonstration circuits for this part:
Step 1: Download and install LTspice on your computer.
Step 2: Click on the link in the section below to download a demonstration circuit.
Step 3: If LTspice does not automatically open after clicking the link below, you can instead run the simulation by right clicking on the link and selecting “Save Target As.” After saving the file to your computer, start LTspice and open the demonstration circuit by selecting ‘Open’ from the ‘File’ menu.
Models for the following parts are available in LTspice:
ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal.
Sample & Buy
The USA list pricing shown is for BUDGETARY USE ONLY, shown in United States dollars (FOB USA per unit for the stated volume), and is subject to change. International prices may differ due to local duties, taxes, fees and exchange rates. For volume-specific price or delivery quotes, please contact your local Analog Devices, Inc. sales office or authorized distributor. Pricing displayed for Evaluation Boards and Kits is based on 1-piece pricing.